The Communist Party of Great Britain was in existence from 1920 to 1991.
Communist Party of Great Britain or Communist Party of Britain may also refer to:
- Communist Unity Group, an early communist group which joined the CPGB in 1920
- Communist Party of Britain, a continuity organisation of the CPGB formed in 1988
- Communist Party (British Section of the Third International), active during 1920
- Communist Party of Great Britain (Provisional Central Committee), founded in 1980 but adopted the current name in the 1990s
- Communist Party of Britain (Marxist–Leninist), an anti-revisionist group formed in 1968
- Communist Party of Great Britain (Marxist–Leninist), an anti-revisionist group founded in 2004
- Communist Party of South Wales and the West of England
- Communist Workers' Party, a left communist group active during the early 1920s
- New Communist Party of Britain, an anti-revisionist group formed in 1977
- Revolutionary Communist Party (UK, 1944), a Trotskyist group which existed from 1944 to 1949
- Revolutionary Communist Party (UK, 1978), a Trotskyist group formed in 1978 and disbanded in the late 1990s
- Revolutionary Communist Party (UK, 2024), a Trotskyist party formed in 2024, part of the International Marxist Tendency
- Revolutionary Communist Party of Britain (Marxist–Leninist), an anti-revisionist group formed in 1979, previously Maoist